We study the existence of T -periodic solutions of some first order functional differential equations. Several existence criteria are established for our problems; in particular, we obtain conditions for the existence of multiple (even infinitely many) T -periodic solutions of one of the problems. E
Periodic solutions of a system of first-order partial differential equations
β Scribed by I. Tazhimuratov
- Publisher
- SP MAIK Nauka/Interperiodica
- Year
- 1981
- Tongue
- English
- Weight
- 214 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0001-4346
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π SIMILAR VOLUMES
## a b s t r a c t In this paper, we rigorously show the existence of multiple positive periodic solutions for a system of the first order nonautonomous differential equations in the form of The proof relies on some analytical techniques and coincidence degree theory. As an application, we study t
The paper is concerned with the functional differential equation where Ξ» > 0, a(t), b(t), h 1 (t) and h 2 (t) are periodic functions. Applying Leggett-Williams fixed point theorem to the equation, we show the explicit open intervals of Ξ» such that the equation has at least three nonnegative periodi